well first off you should talk to some one that has been diving for a few ,they have used other regs and seen the differance in them how the breath ,cost,and well well they last ,,,when you go under the water your life is in your hands if you buy junk, so do your homework and use your money wise,,,get a good reg to start so you wont have to get another one later on,,,dive safe plan your dive and dive your plan : )